Admit one user per 30s

Author: jahooma

web/src/server/free-session/config.ts

@@ -7,14 +7,15 @@ import { env } from '@codebuff/internal/env'
  */
 export const FREEBUFF_ADMISSION_LOCK_ID = 573924815
 
-/** Admission tick cadence. Fast enough to drain the queue promptly, slow
- *  enough to avoid DB churn. */
-export const ADMISSION_TICK_MS = 5_000
+/** Admission tick cadence. Paired with MAX_ADMITS_PER_TICK=1 this staggers
+ *  admissions so newly-admitted CLIs don't all POST to the
+ *  Fireworks deployment simultaneously. */
+export const ADMISSION_TICK_MS = 15_000
 
-/** Max users admitted in a single tick. Protects against thundering-herd
- *  admissions when capacity frees up all at once (e.g. after a Fireworks
- *  incident clears). */
-export const MAX_ADMITS_PER_TICK = 20
+/** Max users admitted in a single tick. Staggering matters more than
+ *  throughput here: keeps load on Fireworks smooth even when a
+ *  large block of sessions expires at once. */
+export const MAX_ADMITS_PER_TICK = 1
 
 export function isWaitingRoomEnabled(): boolean {
   return env.FREEBUFF_WAITING_ROOM_ENABLED